tx: Update transifex slug for 4.2
tx: Update transifex slug for 4.2

Former-commit-id: 2ba935404f97275ffbdbc6bdddb9b1c8ca816e36
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin